Diamond power



Oct. 4 1 2 1,644,275

9 c. l. RAWSON I BOILER CLEANER Filed April 4. 1921 2 Sheets-Sheet l Patented Oct. 4, 1927.

UNITED STATES PATENT OFFICE.

GRANT I. RAWSON, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

DIAMOND POWER SPECIALTY CORPORATION, OF DETROIT, MICHIGAN, A CORPORA- TION OF MICHIGAN.

BOILER CLEANER.

Application filed April 4, 1921. Serial No. 458,295.

My invention relates to a new and useful improvement in a boiler cleaner, and is designed principally for use with that class of boiler cleaners in which a cleaning fluid is discharged from a rotatable blower unit, against, into or in the proximity of the tubes of the boiler.

One of the objects of the invention is the provision in a boiler cleaner having a rotatable blower unit of gearing for rotating said unit assembled in a housing so as to be protected from the dust and dirt at all times.

Other objects will appear hereinafter.

The invention consists of the combinations and arrangements of parts hereinafter described and claimed. 7

The invention will be best understood by reference to the accompanying drawings which form a part of this specification, and in which,

Fig. 1 is a central of the invention. I

Fig. 2 is a sectional view taken on. substantialline 2-2 of Fig. 1.

Fig. 3 is a fragmentary side elevational view of the invention showing the cap and connection used therewith.

Fig. 4 is a front elevational view of the invention.

In the use of boiler cleaners of the class to which the invention is adaptable, the cleaning fluid is discharged from a blower unit so as to remove the soot and ashes from vertical sectional view the tubes of the boiler.

The cleaning fluid generally used is steam under pressure but compressed air may be used. With some types of boiler cleaners it is desirable that a geared arrangement be provided for rotating the blower unit so as to sweep slowly over the tubes. One type of gearing arrangement has been provided in which the gears are assembled in an operative position in a housing. However, the steam admitted to the housing is permitted to have access to the gears which results in a corroding of the same and a consequent injuring of the gears so as to render the device less eflicient in operation.

To overcome these difficulties and to provide, to all intents and purposes, an effective arrangement of gearing for rotating the blower unit, I have provided in my inven tion a wall box 8, which is adapted to be embedded in the wall 7 of the boiler with which the invention is to be used.

Lateral projections in the form of lugs 8 serve to afford 'a more substantial mounting of the wall box in the wall. Projecting thru the wall box and into the setting of the boiler is a blower unit 10, which is provided with nozzles as will be readily understood. The wall box 8 is secured to a housing 11 by means of suitable bolts 14, which are projected thru lugs 13 formed on the wall box and threaded into sockets formed in lugs .12, which are formed on the housing 11.

A. cap 15 is provided as an enclosure for one end of the housing 11 said cap 15 being secured to the housing 11 by means of bolts 15, which are projected thru a flange formed on the cap and threaded in the shoulders 11 and formed on the housing- 11.

It is to be noted that the pipe 10 which is rotatably mounted, projects thru the wall box and thru the housing and thru the cap 15, suitable openings being provided for the projection of the pipe.

Securely fastened to the cap 15 by means of a suitable bolt 17 is an elbow 18, said bolt 17 being projected thru lugs 16 and 17 formed respectively on the cap 15 and the elbow 18. Threaded into the elbow 18 is a pipe 20 which communicates with some suitable source of steam supply.

It is to be noted that the elbowprojects into a sort of hub formed on the cap 15, the interior end of said pipe being spaced from the base of the bore of the cap so as to form a stufling b02119 in which is maintained suitable packing so as to provide a means of swivelly mounting the pipe 10 and.

affording a steam tight joint.

Mounted upon the pipe 10, in an embracing position, is a gear 21, a set screw 21' being threaded in the hub 25 thereof so as to maintain said gear fixed relatively to the pipe 10.

Mounted upon a shaft 30 and projecting into the housing 11 is a gear 22 which meshes with the gear 21.

Mounted upon the pipe 10 is a collar 23 which engages at one end the base of the housing 11. Positioned in an embracing position upon the pipe 10, intermediate the collar 23 and the interior end of the'hub 25, are three disc like collars 26, 27 and 28, the

collars 26 and 27 and provided with ball bearings 29 which rest in sockets formed therein, said ball bearings being adapted to project beyond opposite sides of the collar 28 so as to engage at opposite sides the surface of the discs or collars 26 and 27.

In operation the steam is turned into the pipe 20 whenever a cleaning of the boiler is desired.

The shaft 30 is caused to rotate by means ofthe Wheel 31 which may, however, be a sheave Wheel co-operating with the chain or be a hand wheel. The rotating of the shaft 30 brings about the rotation of the pipe 10 and no steam is permitted access to the gears 22 and 21.

The forward thrust of the unit 10 resulting from the pressure of the steam which is passing therethrough, has a tendency to move the gear wheel 21 inwardly relatively to the boiler. This brings the hub 25 closely into contact with the disc 26 and the ball bearing arrangement serves to minimize the friction incident to this contact. l/Vere this ball bearing arrangement not present, the hub would be brought into contact with the collar 23 and the rotating of the unit thereof rendered more diflicult.

An opening 32 is provided in the housing 11 which is closed by plug 33, said opening 32 serving as means for delivering oil to the gears.

Having thus described my invention which I claim is new and desire to secure by Letters Patent is:

1. In a boiler cleaner, the combination with a rotatable blower element and a wall box through which said element passes, of gearing for driving said blower element, and a housing for said gearing detachably secured to said wall box and providing a bearing for said blower element.

2. In a boiler cleaner, the combination with a rotatable blower element and a wall box through which said element projects, of a gear for driving said blower element, a housing for said gear detachably secured to said wall box, said element being journaled in said housing and extending therethrough, anda fluid supply pipe for said element inserted in the outer end of said housing, the outer end of said element being inserted in said pipe. I

3. In a boiler cleaner, the combination with a rotatable blower element anda wall boX through which said element projects, of a gearing for driving said element, a housing for said gearing detachably secured to said wall box, said element being journaled in said housing and extending.therethrough, fluidsupplypipe embracing the extremity of said element and fitted into a wall of said housing and packing surrounding saidelement and compressed between said pipe and wall.

In testimony whereof, I have hereunto V signed the foregoing specification at Detroit, l Vayne County, Michigan this 29th day of March 1921.

GRANT I. RAWSON. 

